I'm quite an anxious person and had a panic attack a couple days ago. I've had them before and know they pass and that's ok. What caused it was reading an article about 2 runners who died at the end of a half marathon. I'm due to run one on Sunday and had been concerned about my heart, prior to reading this ar cal. My heart rate when it got measured at a scanner was 98. Despite my anxiousness, I'd consider myself fit and active and am concerned at why it's so high.